RYOBI RBC42FSBO Grass Trimmer or Brushcutter User Manual

RYOBI RBC42FSBO Grass Trimmer or Brushcutter

Product Information

The RBC42FSBO/RBC52FSBO/RBC52FSBOS is a cutting tool designed for outdoor use. It comes with Tri-ArcTM and saw blades that are specifically manufactured for this product. The product features a protective cover for the blade to ensure safety during transport and storage. The product is designed with high-quality materials to provide durability and reliability over extended use.

Product Usage Instructions

1. Read the manual carefully before assembling, maintaining, and operating the product.
2. Use only the Tri-ArcTM and saw blades provided by the manufacturer. Do not use any other cutting accessories.
3. Always cover the blade with its protective cover when transporting or storing the product.
4. Remove the protective cover before using the product. Failure to do so may result in the protective cover becoming a projectile when the blade is in motion.
5. Do not run while using the product. Walk at a steady pace.
6. Do not step back while using the product.

Following these instructions will help ensure safe and efficient use of the RBC42FSBO/RBC52FSBO/RBC52FSBOS cutting tool.

Important
It is essential that you read the instructions in this manual before assembling, maintaining, and operating the product.

Assembly instructions

(Original instructions)

Safety, performance, and dependability have been given top priority in the design of your grass trimmer/brushcutter.

INTENDED USE

The grass trimmer/brushcutter is intended to be used only by adults who have read and understood the instructions and warnings in this manual and can be considered responsible for their actions. The product is only intended for use outdoors in a well-ventilated area. For safety reasons, the product must be adequately controlled by using two-handed operation. The product fi tted with the grass trimmer head (and appropriate guard) is intended for cutting long grass, pulpy weed, and similar vegetation at or about ground level. When fi tted with the Tri-Arc™ blade (and appropriate guard), it can also cut bushes. When fi tted with the saw blade (and appropriate guard), it can also cut small trees. The cutting plane should be approximately parallel to the ground surface. The product should not be used to cut or trim hedges, bushes, or other vegetation where the cutting plane is not parallel to the ground surface.

WARNING
To reduce the risk of injury, the user must read and understand the operator’s manual.

WARNING
Do not attempt to operate the product until you have read thoroughly and understood completely all instructions and safety rules contained in this manual. Failure to comply may result in accidents involving fi re, electric shock, or serious personal injury. Save the operator’s manual and review frequently for continuing safe operation, and instructing others who may use the product.

WARNING
The product is not intended to be used by children or persons with reduced physical, mental, or sensory capabilities. Children should be adequately supervised to ensure they do not play with the product.

READ ALL INSTRUCTIONS.

GENERAL SAFETY WARNINGS

• For safe operation, read and understand all instructions before using the product. Follow all safety instructions. Failure to follow all safety instructions listed in the manual can result in serious personal injury.
• Some regions have regulations that restrict the use of the product. Check with your local authority for advice.
• Do not allow children or untrained individuals to use the product.
• Never start or run the engine in a closed or poorly ventilated area; breathing exhaust fumes can kill.
• Clear the work area before each use. Remove all objects, such as rocks, broken glass, nails, wire, or string which can be thrown or become entangled in the string head or blade.
• Wear full eye and hearing protection while operating the product. If working in an area where there is a risk of falling objects, head protection must be worn.
• Hearing protection may restrict the operator’s ability to hear warning sounds. Pay particular attention to potential hazards around and within the work area.
• Wear heavy long trousers, non-slip protective footwear and gloves. Do not wear loose clothing, short trousers, jewellery of any kind, or use with bare feet.
• Secure long hair so it is above shoulder level to prevent entanglement in any moving parts.
• Keep all bystanders, children, and pets at least 15 m away. Stop the product if anyone enters the area.
• Do not operate the product when you are tired, ill, or under the influence of alcohol, drugs, or medication.
•  Do not operate in poor lighting. The operator needs clear, unrestricted vision to identify potential hazards.
• Keep firm footing and balance. Do not overreach. Overreaching can result in loss of balance or exposure to hot surfaces.
•  Keep all parts of your body away from any moving part.
• Do not touch area around the silencer or cylinder of the product, these parts get hot from operation.
• Always stop the engine before making any adjustments.
• Do not smoke when mixing fuel or filling fuel tank.
• Mix and store fuel in a container approved for fuel.
•  Mix fuel outdoors where there are no sparks or flames. Wipe up any fuel spillage. Move 9 m away from refueling site before starting engine.
•  Stop the engine and allow to cool before refueling or storing the unit.
•  Allow the engine to cool, empty the fuel tank, and secure the product from moving before transporting in a vehicle.
•  Always stop the engine, allow it to cool, and make sure all moving parts have come to a complete stop before:
  •  servicing
  •  leaving the product unattended
  • cleaning your product
  •  changing accessories
  •  clearing blockages
  • checking for any damage after hitting an object
  •  checking for any damage if the product starts to vibrate abnormally
  • performing maintenance
  •  removing the blade
  • installing the blade

WARNING
Never use cutting means or attachments which are not specified by Ryobi in this manual. This includes the use of metal multi-piece pivoting chains and fl ail-blades. These items are known to break up during use and present a high risk of serious injury to the operator or bystanders.

WARNING
Inspection after dropping or other impacts: Thoroughly inspect the product and identify any problems or damage to it. Any part that is damaged should be properly repaired or replaced by an authorised service centre.

TRIMMER SAFETY WARNINGS

•  Replace string head if cracked, chipped, or damaged in any way. Be sure the string head or blade is properly installed and securely fastened. Failure to do so can cause serious injury.
• Avoid using on wet grass.
• Do not walk backwards when using the product.
• Walk, never run.
• The small blade fitted to the cutting attachment guard is designed to trim the new extended line to the correct length, for a safe and optimum performance. It is very sharp; do not touch it, particularly when cleaning the product.
• Always ensure that ventilation openings are kept clear of debris.
• Before each use and after any impact, check that there are no damaged parts. Examine the cutting means for signs of cracking or other damage. A defective switch or any part that is damaged should be properly repaired or replace by an authorised service facility.
•  Make sure the head attachment is properly installed and securely fastened.
•  Make sure all guards, deflectors, and handles are properly and securely attached.
• Do not modify the product in any way, this may increase the risk of injury to yourself or others.
• Use only the manufacturer’s replacement line in the cutting head. Do not use any other cutting attachment.
• Never operate the product without the cutting attachment guard in place and in good condition.
• Maintain a firm grip on both handles while trimming. Keep the string head below waist level. Never cut with the string head located over 76 cm above the ground.

BRUSHCUTTER SAFETY WARNINGS

• In addition to the above rules, these additional instructions are appropriate when using the product in brushcutter mode.
• Use heavy-duty gloves while installing or removing blades. They have sharp edges.
• Do not attempt to touch or stop the blade when it is rotating.
•  A moving blade can cause severe injury. Maintain proper control of the product with both hands until the blade has completely stopped rotating.
• Replace any blade that has been damaged. Always make sure the blade is installed correctly and securely fastened before each use.
•  Use only the manufacturer’s replacement Tri-Arc™ or saw blade. Do not use any other cutting attachment.
• Never cut any material over 13 mm diameter for Tri-Arc™ blade and over 40 mm diameter for the saw blade.
•  Your brushcutter is fitted with a harness. Carefully adjust the harness to fit comfortably. The harness supports the weight of the product at your right side.
• Identify the quick-release mechanism and practice using it before you start using the product. Its correct use may prevent serious injury in the case of an emergency. Never wear additional clothing over the harness or otherwise restrict access to the quick-release mechanism.
• Cover the blade with the blade protector before storing the product or during transportation. Always remove the blade protector before using the product. If not removed, the blade protector could become a thrown object when the blade begins to turn.
•  Exercise extreme caution when using the blade with the product. Blade thrust is the reaction that may occur when the spinning blade contacts anything it cannot cut. This contact may cause the blade to stop for an instant, and suddenly “thrust” the product away from the object that was hit. This reaction can be violent enough to cause the operator to lose control of the product. Blade thrust may occur without warning if the blade snags, stalls, or binds. This is more likely to occur in areas where it is difficult to see the material being cut.
• For cutting ease and safety, approach the weeds being cut from the right to the left. In the event when an unexpected object or woody stock is encountered, this practice could minimize the blade thrust reaction. Both hands must be used at all times to control the product.

RESIDUAL RISKS
Even when the product is used as prescribed, it is still impossible to completely eliminate certain residual risk factors. The following hazards may arise in use and the operator should pay special attention to avoid the following:

•  Injury caused by contact with cutting means. Ensure that the blade protectors are fitted when the product is not in use. Keep hands and feet away from the blades at all times.
• Injury caused by vibration. Always use the right tool for the job, use designated handles and restrict working time and exposure.
•  Hearing injury caused by exposure to noise. Wear hearing protection and limit exposure.
• Eye injury due to flying debris. Wear eye protection at all times.
• Injury caused by kickback can occur when using the brushcutter. Ensure proper control by using both hands on the designated handles. Read and follow the directions in this manual to help reduce the risk of kickback.
• Injury caused by falling objects. Wear head protection if there is any risk of falling objects.

RISK REDUCTION

It has been reported that vibrations from handheld tools may contribute to a condition called Raynaud’s Syndrome in certain individuals. Symptoms may include tingling, numbness, and blanching of the fingers, usually apparent upon exposure to cold. Hereditary factors, exposure to cold and dampness, diet, smoking, and work practices are all thought to contribute to the development of these symptoms.

It is presently unknown what, if any, vibrations or extent of exposure may contribute to the condition. There are measures that can be taken by the operator to possibly reduce the effects of vibration:

• Keep your body warm in cold weather. When operating the product, wear gloves to keep the hands and wrists warm. It is reported that cold weather is a major factor contributing to Raynaud’s Syndrome.
• After each period of operation, exercise to increase blood circulation.
• Ensure that the product is correctly located in a designated working position before starting.
• Limit the amount of exposure per day. Take frequent work breaks.
• If you experience any of the symptoms of this condition, immediately discontinue use and see your doctor.

WARNING
Injuries may be caused or aggravated by prolonged use of the product. When using any tool for prolonged periods, ensure you take regular breaks.

TRANSPORTATION AND STORAGE

•  Stop the engine and allow it to cool before storing or transporting.
• Clean all foreign material from the product.
•  If a cutting blade is fitted, cover it with the blade protector.
• Drain all fuel from tank into a container approved for petrol. Remember to properly replace and tighten the fuel cap.
•  Run the engine until it stops. This will remove all fuel that could become stale and leave varnish and gum in the fuel system.
• Store the product in a cool, dry, and well-ventilated place that is inaccessible to children. Keep away from corrosive agents such as garden chemicals and de-icing salts.
•  Do not store outdoors.
• When transporting the product in a vehicle, secure it against movement or falling to prevent injury to persons or damage to the product.
•  Never carry or transport the product while the engine is running.
• Abide by all government and local regulations for the safety storage and handling of petrol.

Short term storage (less than 1 month)

• Stop the engine, and allow it to cool before storing.
• Clean all foreign material from the product.
• If a cutting blade is fitted, cover it with the blade protector.
• Store the product in a cool, dry, and well-ventilated place that is inaccessible to children.
• Keep away from corrosive agents such as garden chemicals and de-icing salts.
• Do not store outdoors.

SYMBOLS
Some of the following symbols may be used on your grass trimmer/brush cutter. Please study them and learn their meaning. Proper interpretation of these symbols allows you to operate the product better and safer.

| Safety alert
---|---
| To avoid serious personal injury, do not attempt to use this product until you read thoroughly and understand completely the operator’s manual.
| Beware of thrown or flying objects. Keep all bystanders, especially children and pets, at least 15 m from the operating area.
| This guard is not intended for use with a toothed saw type blade.
| Rotational direction and maximum speed of the shaft for the cutting attachment.
| Wear non-slip safety footwear when using this equipment.
| Wear non-slip, heavy-duty gloves.
|

Beware of blade thrust.

|

Wear eye, ear, and head protection.

| To reduce the risk of injury or damage, avoid contact with any hot surface.
| | | Keep hands away from blades.
| Keep hands away from saw blades.
---|---
|

Hot surface

| Use unleaded petrol intended for motor vehicle use with an octane rating of 91 [(R

+ M)/2] or higher.

| Use 2-stroke oil for air cooled engines.
| Mix the fuel mix thoroughly and also each time before refueling

| Conforms to all regulatory standards in the country in the EU where the product is purchased.
|

EurAsian Conformity Mark

| Ukrainian mark of conformity
| Tri-Arc™ blade
| Ignition switch: O = STOP, I = RUN
****| Fully press and release the primer bulb 10 times.
| Pull the starter grip to start the engine.
|

Squeeze throttle trigger to run.

|

Starting a cold engine by hand

|

Starting a warm engine by hand

| Starting a cold engine by electrical starter

| Starting a warm engine by electrical starter
|

Direction of handle rotation

| Guaranteed sound power level is 112 dB.
| Choke closed
---|---
| Choke open
| Pull: Quick release tab
| When fitting the line spool to the cutting means, this symbol should be visible to the operator.
| Lock
| Unlock
| Stop the product.

DESCRIPTION

1.  Power head
2. Strap hanger
3. Bike handle
4. Shaft
5. Cutting attachment guard
6. Tri-Arc™ blade
7. ReelEasy™ string trimmer head
8.  Bike handle lock knob
9. Quick release tab
10.  Latch
11.  Mounting bracket
12.  Screw
13. Wrench
14. Allen wrench (5 mm)
15.  Hole in the gear case
16.  Hole in the upper flange washer
17.  Upper flange washer
18.  Blade washer
19. Cupped washer
20. Gear head
21. Combination wrench
22. Drive connector
23. String head housing
24. Spring
25. Hex bolt
26. Spool
27. Knob
28. String head cover
29. Best cutting area
30.  Dangerous cutting area
31.  Direction of cutter rotation
32. Ignition switch
33. Throttle trigger
34. Throttle lock
35.  Throttle interlock
36. Primer bulb
37.  Choke lever
38.  Tri-Arc™ blade protector
39. Air filter knob
40.  Air filter cover
41. Filter
42. Harness
43.  Saw blade
44. Saw blade guard
45.  Saw blade protector
46. Flat washer
47. Blade nut
48.  Grass deflector
49.  Blade guard
50. Guard screw
51. Starter bit
52.  Electrical starter
53.  F/R button
54.  Starter bit shaft
55.  Shaft hole on the engine
56. Switch button

ASSEMBLY

UNPACKING
The product requires assembly.

• Carefully remove the tool and any accessories from the box. Make sure that all items listed in the packing list are included.
• Inspect the tool carefully to make sure no breakage or damage occurred during shipping.
• Do not discard the packing material until you have carefully inspected and satisfactorily operated the tool.

PACKING LIST

• Grass trimmer/brushcutter x 1
• ReelEasy™ string trimmer head x 1
•  Cutting attachment guard x 1
• Tri-Arc™ blade x 1
• Harness x 1
• Operator’s manual x 1
• Engine oil x 1
•  Combination wrench x 1
•  Wrench x 1
• Allen wrench (5 mm) x 1
•  Saw blade x 1 (RBC52FSBOS)
• Saw blade guard x 1 (RBC52FSBOS)

WARNING
If any parts are damaged or missing, do not operate the product until the parts are replaced. Failure to heed this warning could result in serious personal injury.

WARNING
Do not attempt to modify the product or create accessories not recommended for use with the product. Any alteration or modifi cation is misuse and could result in a hazardous condition leading to possible serious personal injury.Never attach or adjust any attachment while power head is running. Failure to stop the engine may cause serious personal injury. Be certain all knobs and fasteners are fully tightened before operating the product; check it periodically for tightness during use to avoid serious injury.

SETTING UP THE HANDLE
See figure 2.

1. Loosen the bike handle lock knob.
2. Lift and rotate the handle to the desired position. Make sure the alignment arrows are aligned.
3. Tighten the bike handle lock knob.

NOTE: The product has a built-in micro-switch that deactivates the engine if the bike handle lock knob is not fully tightened, and the alignment arrows are not properly aligned.

WARNING
Check the bike handle lock knob for tightness periodically to avoid serious injury.

ATTACHING THE HARNESS
See figure 3.

1. Connect the latch on the harness to the strap hanger.
2. Adjust the strap hanger to a comfortable and balanced position where the blade or cutter attachment will suspend between 100 mm and 300 mm above the ground surface.

NOTE: Always use the harness with the product.
NOTE: To quickly release the product from the harness, sharply pull the quick-release tab.

FITTING THE CUTTING ATTACHMENT GUARD
See figure 4.

1. Attach the cutting attachment guard to the mounting bracket and align the screw holes on the cutting attachment guard to the screws on the mounting bracket.
2.  Tighten screws.

WARNING
When using the Reel Easy™ string trimmer head, the grass deflector must be attached to the blade guard. See figure 24. When using the Tri-Arc™ blade, the grass deflector must be removed from the blade guard. See figure 23.

WARNING
When using the saw blade, the saw blade guard must be attached to the mounting bracket.

INSTALLING THE REELEASY™ STRING TRIMMER HEAD
See figure 5.

1.  Stop the engine.
2. Place the Allen wrench through the hole in the upper flange washer and the hole in the gear head. Turn blade nut clockwise to remove.
3. Remove the blade nut and the blade washer from the gear shaft.
4. Open the Reel Easy™ string trimmer head depressing the latches on each side.
5. The contents of the bump head are spring-loaded, so keep your other hand over the string head cover while depressing the latches. Remove the string head cover, bump knob, and line spool.
6.  Install the cupped washer. Install the drive connector into the gear shaft. Place the Allen wrench through the hole in the upper flange washer and the hole in the gear head. Using the combination wrench, turn the drive connector counterclockwise and tighten securely.
7. Place the string head housing on the drive connector. Make sure the housing is fully seated.
8.  Place the Allen wrench through the hole in the upper flange washer and the hole in the gear head. Place the washer and hex bolt into the drive connector. Using a wrench, turn the hex bolt counterclockwise and tighten.
9. Reinstall the spool. Make sure the symbol for “straight shaft” is visible.
10.  Replace the bump knob by inserting it into the centre of the line spool.
11.  Replace the string trimmer head cover, aligning latches with openings in the string trimmer head. Press cover and string trimmer head together until both latches snap securely into the openings.
12. Install the cutting line. Refer to “String replacement” later in the manual for additional information.

WARNING
To reduce the risk of serious personal injury, always stop the engine before making any adjustments, such as changing cutting heads.

CONVERTING FROM GRASS TRIMMER TO BRUSHCUTTER (TRI-ARC™ BLADE)
Removing the Reel Easy™ string trimmer head
See figure 6.

1. Stop the engine.
2.  Open the Reel Easy™ String Trimmer Head by depressing the latches on each side. The contents of the bump head are spring loaded, so keep your other hand over the string head cover while depressing the latches.
3.  Remove the string head cover, bump knob, and line spool.
4. Place the Allen wrench through the hole in the upper flange washer and the hole in the gear head. Using a wrench, turn the hex bolt clockwise to remove.
5. Remove the washer and the string head housing from the drive connector.
6. Using a combination wrench, turn the drive connector clockwise to remove.
7. Remove the cupped washer from the gear shaft and retain for later use.

NOTE: Store the disassembled parts together for later use.

WARNING
When using the Tri-Arc™ blade, the grass deflector must be removed from the blade guard. See figure 23.

Installing the Tri-Arc™ blade
See fi gure 6.
To reduce the risk of injury, keep the blade protector on the blade at all times. Remove the blade protector only during cutting operations.

1. Centre the blade on the upper flange washer and make sure the blade sits fl at. Install the cupped washer and make sure it sits well into the gear shaft. Install the blade washer with the raised centre away from the blade.
2.  Install the blade nut.
3. Place the Allen wrench through the hole in the upper flange washer and the hole in the gear head. Using the combination wrench, turn the blade nut counterclockwise and tighten.

CONVERTING FROM BRUSHCUTTER (TRI-ARC™ BLADE) TO GRASS TRIMMER
Removing the Tri-Arc™ blade
See figure 7.

1. Stop the engine.
2.  Place the Allen wrench through the hole in the upper flange washer and the hole in the gear head. Turn blade nut clockwise to remove.
3. Remove the blade nut, cupped washer, and blade and retain for later use.
4. Attach the grass deflector to the blade guard by placing the two locking tabs into the two notches; tighten the screw.

NOTE: Store the disassembled parts together for later use.

Installing the ReelEasy™ string trimmer head
See figure 7.

1.  Install the cupped washer. Install the drive connector into the gear shaft. Place the Allen wrench through the hole in the upper flange washer and the hole in the gear head. Using the combination wrench, turn the drive connector counterclockwise and tighten securely.
2.  Place the string head housing on the drive connector. Make sure the housing is fully seated.
3. Place the Allen wrench through the hole in the upper flange washer and the hole in the gear head. Place the washer and hex bolt into the drive connector. Using a wrench, turn the hex bolt counterclockwise and tighten.
4. Reinstall the spool. Make sure the symbol for “straight shaft” is visible.
5. Replace the bump knob by inserting it into the centre of the line spool.
6. Replace the string trimmer head cover, aligning latches with openings in the string trimmer head. Press cover and string trimmer head together until both latches snap securely into the openings.
7. Install the cutting line. Refer to “String replacement” later in the manual for additional information.

WARNING
When using the Reel Easy™ string trimmer head, the grass deflector must be attached from the blade guard. See figure 24.

CONVERTING FROM GRASS TRIMMER TO BRUSHCUTTER (SAW BLADE)
Removing the cutting attachment guard
See figure 8.

1. Stop the engine.
2. Remove the cutting attachment guard from the mounting bracket.

Removing the ReelEasy™ string trimmer head
See figure 8.

1. Open the ReelEasy™ String Trimmer Head by depressing the latches on each side. The contents of the bump head are spring loaded, so keep your other hand over the string head cover while depressing the latches.
2. Remove the string head cover, bump knob, and line spool.
3. Place the Allen wrench through the hole in the upper flange washer and the hole in the gear head. Using a wrench, turn the hex bolt clockwise to remove.
4. Remove the washer and the string head housing from the drive connector.
5. Using a combination wrench, turn the drive connector clockwise to remove.
6. Remove the cupped washer from the gear shaft and retain for later use.

NOTE: Store the disassembled parts together for later use.

Installing the saw blade guard
See figure 8.

1.  Attach the saw blade guard to the mounting bracket and align the screw holes on the saw blade guard to the screws on the mounting bracket.
2. Tighten screws securely.

WARNING
When using the saw blade, the saw blade guard must be attached to the mounting bracket.

Installing the saw blade
See fi gure 8.
To reduce the risk of injury, keep the blade protector on the blades at all times. Remove the blade protector only during cutting operations.

1. Centre the blade on the upper flange washer and make sure the blade sits fl at. Install the cupped washer and make sure it sits well into the gear shaft. Install blade washer with the raised centre away from the blade.
2.  Install the blade nut.
3. Place the Allen wrench through the hole in the upper flange washer and the hole in the gear head. Using the combination wrench, turn the blade nut counterclockwise and tighten.

WARNING
Make sure the saw blade is in correct position. When installing the saw blade, the silkscreen on the blade is always on the top and towards the saw blade guard.

CONVERTING FROM BRUSHCUTTER (SAW BLADE) TO GRASS TRIMMER
Removing the saw blade and saw blade guard
See figure 9.

1.  Stop the engine.
2.  Place the Allen wrench through the hole in the upper flange washer and the hole in the gear head. Turn the blade nut clockwise to remove.
3.  Remove the blade nut, cupped washer, saw blade, and saw blade guard and retain for later use.

NOTE: Store the disassembled parts together for later use.

Installing the Reel Easy™ string trimmer head
See Figure 9.

1. Install the cupped washer. Install the drive connector into the gear shaft. Place the Allen wrench through the hole in upper flange washer and the hole in the gear head. Using the combination wrench, turn the drive connector counterclockwise and tighten securely.
2.  Place the string head housing on the drive connector. Make sure the housing is fully seated.
3.  Place the Allen wrench through the hole in the upper flange washer and the hole in the gear head. Place the washer and hex bolt into the drive connector. Using a wrench, turn the hex bolt counterclockwise and tighten securely.
4. Reinstall the spool. Make sure the symbol for “straight shaft” is visible.
5. Replace the bump knob by inserting it into the centre of the line spool.
6. Replace the string trimmer head cover, aligning latches with openings in the string trimmer head. Press cover and string trimmer head together until both latches snap into openings securely.
7. Install the cutting line. Refer to “String replacement” later in the manual for additional information.

Installing the cutting attachment guard See figure 9.

1. Attach the cutting attachment guard to the mounting bracket and align the screw holes on the cutting attachment guard to the screws on the mounting bracket.
2. Tighten screws securely.

WARNING
When using the Reel Easy™ string trimmer head and Tri-Arc™ blade, the cutting attachment guard must be attached to the mounting bracket. When using the saw blade, the saw blade guard must be attached to the mounting bracket.

OPERATION

FUEL AND REFUELING
Handling the fuel safely

• Always handle fuel with care. It is highly flammable.
• Always refuel outdoors where there are no sparks and flames.
• Do not inhale fuel vapour. Do not smoke. Do not let petrol or lubricant come in contact with your skin.
• Keep petrol and lubricant away from the eyes. If petrol or lubricant comes in contact with the eyes, wash them immediately with clean water. If irritation is still present, see a doctor immediately.
•  Clean up spilled petrol immediately.

MIXING THE FUEL

• This product is powered by a 2-stroke engine and requires pre-mixing petrol and 2-stroke lubricant. Premix unleaded petrol and 2-stroke engine lubricant in a clean container approved for petrol.
• This engine is certified to operate on unleaded petrol intended for motor vehicle use with an octane rating of 91([R+M]/2) or higher.
•  Do not use any type of pre-mixed petrol/lubricant from fuel service stations.
• Use synthetic 2-stroke lubricant only. Do not use automotive lubricant or 2-cycle outboard lubricant.
•  Mix 2.5% synthetic 2-stroke lubricant into the petrol. This is a 40:1 ratio.
• Mix the fuel thoroughly and also each time before refueling.
• Mix in small quantities. Do not mix quantities larger than usable in a 30-day period. A synthetic 2-stroke lubricant containing a fuel stabiliser is recommended.

FILLING THE TANK

• Clean surface around fuel cap to prevent contamination.
•  Loosen fuel cap slowly to release pressure and to keep fuel from escaping around the cap.
• Carefully pour fuel mixture into the tank. Avoid spillage.
• Prior to replacing the fuel cap, clean and inspect the gasket.
• Immediately replace the fuel cap and hand-tighten. Wipe up any fuel spillage. Move 9 m away from the refueling site before starting the engine.
  NOTE: It is normal for smoke to be emitted from a new engine during and after first use.

WARNING
Always shut off engine before fueling. Never add fuel to the product when it is running or when the engine is hot. Move at least 9 m (30 ft) from refuelling site before starting the engine. Do not smoke.

STARTING AND STOPPING

WARNING
Never start or run the engine inside a closed or poorly ventilated area; breathing exhaust fumes can kill.

To start a cold engine by hand: See figure 15.

1. Lay the product on the ground.

2. Push the primer bulb approximately 10 times.

3.  Set the choke lever to position A (choke closed).

4. Pull the starter grip with a quick fi rm and consistent upward motion until the engine attempts to start. Do not pull the starter grip more than 4 times.

5.  Set the choke lever to position B (choke open).

6. Pull the starter grip until the engine starts. Do not pull the starter grip more than 6 times.
   NOTE: If the engine does not start, repeat the procedure from step 3.

7.  Allow engine to warm up for 10 seconds prior to operation.

To start a warm engine by hand: See figure 16.

1.  Lay the product on the ground.
2. Set the choke lever to position B (choke open).
3. Pull the starter grip with a quick firm and consistent upward motion until the engine starts.

Starting the engine using an electrical starter (optional):

WARNING
Only use the Ryobi OES18 electrical starter. Use of any other starter may damage the engine and cause serious personal injury. Before using the electrical starter to start the product, please read and understand completely the operation manual of the OES18 electrical starter to avoid improper operation and serious personal injury.

To start a cold engine by electrical starter: See figure 21.

1.  Install the starter bit into the electrical starter with the pentagon bit facing outside.

2. Push the F/R button to the left until the pentagon symbol shows on the F/R button.

3. Lay the product on the ground and make sure that the cutting means do not come in contact with anything.

4. Press the primer bulb 10 times.
   NOTE: After the 7th press, the fuel should be visible in the primer bulb. If not, continue pressing until the fuel is visible.

5. Set the choke lever to position A (choke closed).

6. Hold the insulated shaft with your left hand and use your right hand to put the starter bit shaft to the shaft hole on the engine. Make sure the starter bit is properly engaged.
   NOTE: The electrical starter is equipped with a safety interlock. Do not press and hold on the switch button when putting the electrical starter shaft into the shaft hole on the engine. The starter will not turn if the electrical starter is not properly engaged.

7.  Press and hold the electrical starter switch button until the engine attempts to start. Do not press the electrical starter for more than 4 seconds.

8. Set the choke lever to position B (choke open).

9. Press and hold the electrical starter switch button until the engine starts.
   NOTE: If the engine does not start, repeat the procedure from step 5. Do not repeat the procedure more than 1 time. If the engine does not start after the second attempt, see the solution instruction for the “Flooded engine” in the “Troubleshooting” section of this manual.

10. Allow the engine to warm up for 10 seconds prior to operation.

To start a warm engine by electrical starter: See figure 22.

1.  Install the starter bit into the electrical starter with the pentagon bit facing outside.
2. Push the F/R button to the left until the pentagon symbol shows on the F/R button.
3. Lay the product on the ground and make sure that the cutting means do not come in contact with anything.
4. Set the choke lever to position B (choke open).
5.  Hold the insulated shaft with your left hand and use your right hand to put the starter bit shaft to the shaft hole on the engine. Make sure the starter bit is properly engaged.
6.  Press and hold the electrical starter switch button until the engine starts.
   NOTE: If the engine does not start, repeat the procedure from step 5. Do not repeat the procedure more than 1 time. If the engine does not start after the second attempt, see the solution instruction for the “Flooded engine” in the “Troubleshooting” section of this manual.

To stop the engine:
See figure 20.
Place the ignition switch to the “O” (OFF) position.

OPERATING THE GRASS TRIMMER
See figure 11.

• Hold the product with the right hand on the trigger handle and the left hand on the left handle. Keep a firm grip with both hands while in operation.
• The product should be held at a comfortable position with the trigger handle about hip height.
•  Always operate the product at full throttle. Prolonged cutting at partial throttle will result in lubricant dripping from the silencer.
• Cut tall grass from the top down to prevent grass from wrapping around the shaft housing and string head, which may cause damage from overheating.
• If grass or debris becomes wrapped around the cutting means, stop the engine. Wear heavy-duty gloves to prevent injury from the sharp blades and carefully remove the debris.

CUTTING TIPS

See figure 12.

• Do not push into the grass to be cut. Move from side to side. Move forward a little at the end of each sweep.
•  Keep the product tilted towards the area being cut.
• Do not use in dangerous environments.
• Use the tip of the string to do the cutting; do not force the string head into the uncut grass.
• Wire and picket fences cause extra string wear, even breakage. Stone and brick walls, kerns and wood may wear string rapidly.
• Avoid trees and shrubs. Tree bark, wood moldings, cladding and fence posts can be easily damaged by the string.

ADVANCING THE LINE
Line advance is controlled by tapping the string head on grass while running engine at full throttle.

• Run engine at full throttle.
• Tap the knob on the ground to advance the string. The string advances each time the knob is tapped. Do not hold the knob on the ground.
• The string should advance until it is cut to length by the line cutting blade located on the cutting attachment guard.

OPERATING THE BRUSHCUTTER

See figure 13 – 14.

•  To help reduce the risk of kickback: Do not push into the material to be cut. Move from right to left in steady sweeps. Move forward a little at the beginning of each new sweep.
• Hold the product with the right hand on the trigger handle and the left hand on the left handle. Keep a firm grip with both hands while in operation.
• The product should be held at a comfortable position with the trigger handle about hip height.
• Maintain your grip and balance on both feet. Position yourself so that you will not be drawn off balance by the kickback reaction of the cutting blade.
• Adjust the strap hanger to a comfortable position.

Exercise extreme caution when using the blade with the product. Blade thrust is the reaction that may occur when the spinning blade contacts anything it cannot cut. This contact may cause the blade to stop for an instant, and suddenly “thrust” the unit away from the object that was hit. This reaction can be violent enough to cause the operator to lose control of the product. Blade thrust may occur without warning if the blade snags, stalls, or binds. This is more likely to occur in areas where it is diffi cult to see the material being cut. For cutting ease and safety, approach the weeds being cut from the right to the left. In the event an unexpected object or woody stock is encountered, this could minimize the blade thrust reaction.

TRI-ARC™ BLADE
The Tri-Arc™ blade is suitable for cutting pulpy weeds and vines only. When the Tri-Arc™ blade becomes dull, it can be turned over to extend its life. Do not sharpen the blade.

SAW BLADE
The saw blade is suitable for cutting pulpy weeds, vines, bushes, and small trees. Worn saw blades can cause poor performance. Check the saw blade before each use. Replace the worn or damaged blade immediately.

CUTTING TECHNIQUE

WARNING
The blades are sharp and can injure even if they are not moving. Exercise extreme caution when using the blade with the product. Safe operation of the product requires that you read and understand this operator’s manual and all labels affi xed to the tool.

• Both hands must be used at all times to control the product. Keep a firm grip with both hands while in operation.
• Maintain your grip and balance on both feet. Position yourself so that you will not be drawn off balance by the kickback reaction of the cutting blade.
• Inspect and clear the area of any hidden objects such as glass, stones, concrete, fencing, wire, wood, metal, etc.
• Never use blades near footpaths, fencing, posts, buildings or other immovable objects.
•  Never use a blade after hitting a hard object without first inspecting it for damage. Do not use if any damage is detected.
•  For cutting ease and safety, approach the weeds being cut from the right to the left.

MAINTENANCE

WARNING
Use only original manufacturer’s replacement parts and accessories. Failure to do so may cause poor performance, possible injury, and will void your warranty.

• The cutting attachment must not rotate in idle mode. If this requirement is not satisfied, the clutch has to be adjusted or the product needs an urgent maintenance by a qualified technician.
• You may make adjustments and repairs described in this user manual. For other repairs, have the unit serviced by an authorized service agent.
•  Consequences of improper maintenance may include excess carbon deposits resulting in loss of performance and discharge of black oily residue dripping from the silencer.
•  Make sure the cutting attachment guards, harness and handles are properly and securely attached to avoid the risk of personal injury.

STRING REPLACEMENT
See figure 10.

• Ensure the ignition switch is in the “off” position.
• Use a 2.4 mm diameter monofilament string.
• Cut one piece of string approximately 6 m in length.
•  Rotate the knob on the string head until the line on knob aligns with the arrows on the top of string head.
•  Insert one end of the string into the eyelet located on the side of the string head and push until string comes out through eyelet on the other side. Continue to push string through the string head until the middle section of the string is inside the string head and string outside the string head is evenly divided on each side.
•  Rotate the knob on the string head clockwise to wind the string.
• Wind the string until approximately 20 cm remains protruding from the string head.

BLADE PROTECTOR
See fi gure 17 – 18.
Always place the blade protector on the blade when the unit is not in use. The blade protector has clips round the edges to snap over the blade and keep it in place. Wear gloves and be cautious when handling the blade.

NOTE: Always remove the blade protector before using the product. If not removed, the blade protector could become a thrown object as the blade begins to turn.

CLEANING THE EXHAUST PORT AND SILENCER
Depending on the type of fuel used, the type and amount of oil used, and/or your operating conditions, the exhaust port and silencer may become blocked with carbon deposits. If you notice a power loss with your petrol-powered tool, a qualifi ed service technician will need to remove these deposits to restore performance.

CLEANING AIR FILTER
See figure 19.

•  Ensure the ignition switch is in the “off” position.

• Remove the air filter knob and air filter cover.

• Remove the air filter and clean it with warm soapy water.

•  Rinse, and let the air filter dry completely.

•  Replace the air filter.
  NOTE: If damaged, replace immediately.

•  Replace the air filter cover.

• Tighten the air filter knob.

NOTE: The air filter should be replaced annually for the best performance.

CHECKING THE FUEL CAP

WARNING
A leaking fuel cap is a fi re hazard and must be replaced immediately.
The fuel cap contains a non-serviceable filter and a check valve. A clogged fuel filter will cause poor engine performance. If performance improves when the fuel cap is loosened, the check valve may be faulty or the fi lter may be clogged. Replace fuel cap if required.

SPARK PLUG
This engine uses an L8RTF/NHSP LD, or L8RTF/BOSCH spark plug or equivalent with 0.5 mm electrode gap. Use an exact replacement.

CAUTION
Be careful not to cross-thread the spark plug. Cross-threading will damage the engine.

TROUBLESHOOTING

TROUBLESHOOTING

Problem| Possible cause| Solution

Engine does not start.

| No spark.| The spark plug may be damaged, remove it and check for dirt and cracks. Replace with a new spark plug.

No fuel.

| Push primer bulb until bulb is full of fuel. If bulb does not fill, primary fuel delivery system is blocked. Contact a service dealer. If primer bulb fills, engine may be flooded (see next item).

Flooded engine.

| Remove spark plug, turn trimmer so spark plug hole is aimed at the ground. Make sure lever is in the position and pull starter cord 10 to 14 times. This will clear excess fuel from engine. Clean and reinstall spark plug. With the throttle trigger fully depressed, pull starter cord three times with the lever at open choke position. If engine does not start, move choke lever to position and follow normal starting instructions in “STARTING AND STOPPING” section. If engine still fails to start, repeat procedure with a new spark plug.
Started rope is now harder to pull than when it was new.| Contact a service dealer.
The knob is not fully tightened and the alignment arrows are not properly aligned.| Align the alignment arrows properly when setting the handle bar to its working position and fully tighten the knob.
Engine starts but does not accelerate.| Carburetor requires adjustment.| Contact a service dealer.

Engine does not reach full speed and emits excessive smoke.

| Check oil fuel mixture.| Use fresh fuel and the correct synthetic 2-stroke oil mix.
Air filter dirty.| Clean air filter. Refer to “Replacing and Cleaning Air Filter” earlier in this manual.
Carburetor requires adjustment.| Contact a servicing dealer.
Engine       starts,        runs,       and accelerates but will not idle.| Carburettor requires adjustment.| Contact a servicing dealer.
Blade continues to rotate at idle speed.| Carburetor requires adjustment.| Contact a servicing dealer.

Grass wraps round shaft housing and string head.

| Cutting tall grass at ground level.| Cut tall grass from the top down.
Operating trimmer at part throttle.| Operate trimmer at full throttle.

Oil drips from silencer.

| Operating trimmer at part throttle.| Operate trimmer at full throttle.
Check oil/fuel mixture.| Use fresh fuel and the correct synthetic 2-stroke oil mix.
Air filter is dirty.| Clean per instruction in Maintenance Section.
Carburetor requires adjustment.| Contact a servicing dealer.

EC DECLARATION OF CONFORMITY

Techtronic Industries GmbH
Max-Eyth-Straße 10, 71364 Winnenden, Germany
Herewith we declare that the product
Grass trimmer / Brushcutter
Brand: Ryobi
Model number: RBC42FSBO / RBC52FSBO / RBC52FSBOS

Serial number range:

• RBC42FSBO: 44463601000001 – 44463601999999
• RBC52FSBO: 44463701000001 – 44463701999999
• RBC52FSBOS: 44463801000001- 44463801999999

is in conformity with the following European Directives and harmonised standards
2006/42/EC, 2004/108/EC (until April 19, 2016), 2014/30/EU (from April 20,
2016), 2000/14/EC, 2005/88/EC, 97/68/EC as last amended 2012/46/EU,
EN ISO 11806-1:2011, EN ISO 14982:2009, EN ISO 3744:2010

Measured sound power level: 109,48 dB (A)
Guaranteed sound power level: 112 dB (A)
Conformity assessment method to Annex V Directive 2000/14/EC amended
by 2005/88/EC.

Floyd Jeffrey Nesom (BSME)
Senior Director of Engineering
Winnenden, Jan. 29, 2016
Authorised to compile the technical file:
Alexander Krug, Managing Director
Techtronic Industries GmbH
Max-EythStraße 10, 71364 Winnenden, Germany

References

• SAV Ryobi France: Pièces détachées et réparations Ryobi : le service client Ryobi
• Ryobi Tools UK
• Ryobi Danmark | Elværktøj ONE+, Havemaskiner, 36V
• Ryobi Tools

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